54 



KR. BONNEVIE. 



[REP. OF THE "MICHAEL SARS" NORTH 



Station 



23 



29 



42 



56 



62 



64 



84 



87 



88 



92 



Date 



5/ 3 6/. 



*h— l % 



23 /5— "/= 



"Ve— Il /e 



20 /6-"/6 



"Ai 



15/, 



"h 



w/ 7 



23/ 7 _24/ 7 



Position yl 



35° 32' 



7° 7' 



35° 10' 

 7° 55' 



28° 2' 



14° 17' 



36° 53' 

 29° 47' 



36° 52° 

 39° 55' 



34° 44' 

 47° 52' 



48° 4' 

 32° 25' 



46° 48' 

 27° 46' 



45° 26' 



25° 45' 



48° 29' 

 13° 25' 



Depth in m. 



0- 50 



50— 100 





1 





















— 











— 







— 



1 



1 



100— 250 



— 



2 



— 



— 



— 



— 



— 



— 



— 



— 



250- 500 



— 



— 



5 



— 



— 



— 



— 



— 



— 



— 



500— 750 



1 



— 





1 



— 



— 



— 



— 



— 



— 



750—1000 



— 



— 





— 



— 



— 



1 



— 



— 



— 



1000—1250 



— 



— 





— 



— 



1 



— 



1 



— 



5 



1250—1500 



— 



— 



— 



— 



1 



2 



1 



— 



— 



— 



Number of individuals of Pneumodermopsis macrochira. 



smaller spines are scattered in the intervals between these 

 ridges; the three ridges were, however, not always so 

 clearly visible as in the specimen figured in pi. V, fig. 41. 



The hook-sacs are shallow with 16 to 20 short and 

 not very strong hooks (textfig. 41 and 40 A). 



The acetabuliferous appendages consist according 

 to Meisenheimer (1905) of a pair of free lateral arms each 

 carrying 44 suckers (one of which is considerably larger 

 than the others), and a median part with 5 suckers. The 

 arm figured by Meisenheimer is. however, so strongly con- 

 tracted that the details in the arrangement of suckers 

 cannot be distinguished; in my material I have seen 

 several examples of similar contraction. 



In a few cases, however, I have found the acetabuli- 

 ferous appendages more or less fully extended, although 

 concealed inside the invaginated proboscis; one of these 

 appendages is drawn in fig. 39, pi. V, while the median 

 portion of an appendage (from another individual) is 

 given in fig. 40. These figures show that the suckers of 

 the lateral arms are arranged in two groups: a proximal 

 group containing a large number (about 30 1 )) of small 

 suckers carried on broad peduncles decreasing in length 

 towards the free end of the arm, and a distal group con- 

 taining 12 or 13 small suckers and a single large one. 

 The suckers are carried in parallel rows along the upper 

 edge of the arm. 



A 



B 



C 



Fig. 40. Pneumodermopsis macrochira: A. Hooks, B.— C. Radula. (B. lateral teeth, 

 C. Part of the radula in the young.) 



*) Whether this number is absolutely constant, 1 cannot tell. 



